{"product_id":"sierra-18-3043-johnson-evinrude-impeller","title":"Sierra 3043 Johnson\/Evinrude Impeller","description":"\u003cp\u003eThe \u003cstrong\u003eSierra 3043 (18-3043) Impeller\u003c\/strong\u003e is a replacement lower-unit water pump impeller for compatible Johnson and Evinrude V4 and V6 outboard engines. Its six flexible blades rotate inside the pump housing to draw cooling water through the gearcase and circulate it through the engine. Replaces OMC numbers 385528, 389642, and 777212.\u003c\/p\u003e\u003ch2\u003eParts Desk Insight — Best Use\u003c\/h2\u003e\u003cp\u003eThis is a large early V4\/V6 impeller (approx. 3-1\/2 in. diameter) covering a specific 1973–1978 horsepower range. Matching by horsepower alone is unreliable — Johnson and Evinrude used different gearcase and water pump configurations within the same HP ratings during this era. The safest approach is to confirm one of the original OMC numbers (385528, 389642, or 777212) from the engine parts diagram before removing the lower unit.\u003c\/p\u003e\u003cp\u003eReplace every 2–3 seasons or 200 hours regardless of visible wear. Impeller vanes harden and lose flexibility before showing obvious damage, reducing cooling flow without warning.\u003c\/p\u003e\u003cp\u003eThis impeller is compatible with Sierra water pump kits 18-3384, 18-3393, and 18-3403 for a complete pump service.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSierra part number: 18-3043\u003c\/li\u003e\n\u003cli\u003eSix flexible impeller blades\u003c\/li\u003e\n\u003cli\u003eApproximate diameter: 3-1\/2 in.\u003c\/li\u003e\n\u003cli\u003eApproximate depth: 1-1\/4 in.\u003c\/li\u003e\n\u003cli\u003eKeyed hub configuration\u003c\/li\u003e\n\u003cli\u003eImpeller only — housing, plate, key, and seals not included\u003c\/li\u003e\n\u003cli\u003eUPC: 030999315052\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eEngine Compatibility\u003c\/h2\u003e\u003cp\u003eDocumented Johnson and Evinrude applications:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e85 HP: 1973–1978\u003c\/li\u003e\n\u003cli\u003e115 HP: 1973–1978\u003c\/li\u003e\n\u003cli\u003e135 HP: 1973–1976\u003c\/li\u003e\n\u003cli\u003e140 HP: 1977–1978\u003c\/li\u003e\n\u003cli\u003e150 HP: 1976–1978\u003c\/li\u003e\n\u003cli\u003e175 HP: 1976–1978\u003c\/li\u003e\n\u003cli\u003e200 HP: 1976–1978\u003c\/li\u003e\n\u003cli\u003e235 HP: 1978\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003ePrimarily V4 and V6 outboards using OEM impeller 385528, 389642, or 777212. Always confirm full model number, production year, gearcase, and OEM impeller number before ordering.\u003c\/p\u003e\u003ch2\u003eAlternate Part Numbers\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSierra: 18-3043 \/ 118-3043\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude\/OMC: 385528, 0385528, 389642, 0389642, 777212, 0777212\u003c\/li\u003e\n\u003cli\u003eGLM Marine: 89680\u003c\/li\u003e\n\u003cli\u003eMallory Marine: 9-45203\u003c\/li\u003e\n\u003cli\u003eCEF: 500305\u003c\/li\u003e\n\u003cli\u003eSEI Marine: 96-399-07E\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eLower-unit removal is required to access the water pump. During service: inspect the pump housing, liner, wear plate, key, and seals; remove any broken impeller fragments from cooling passages; lubricate the new impeller with clean soapy water or approved assembly lubricant; rotate the driveshaft in its normal direction while seating the housing over the blades. Confirm strong cooling-water telltale flow before operating under load. Never operate the outboard without an adequate cooling-water supply.\u003c\/p\u003e\u003ch2\u003eRelated J\/E Impellers\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-18-3050-johnson-evinrude-impeller\"\u003eSierra 3050 (18-3050) Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-18-3051-johnson-evinrude-impeller\"\u003eSierra 3051 (18-3051) Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-18-3090-johnson-evinrude-impeller\"\u003eSierra 3090 (18-3090) Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-3001-johnson-evinrude-impeller\"\u003eSierra 3001 Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-3002-johnson-evinrude-impeller\"\u003eSierra 3002 Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-3055-johnson-evinrude-impeller\"\u003eSierra 3055 Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-3058-johnson-evinrude-impeller\"\u003eSierra 3058 Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-3059-johnson-evinrude-impeller\"\u003eSierra 3059 Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-3083-johnson-evinrude-impeller\"\u003eSierra 3083 Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-31041-johnson-evinrude-impeller\"\u003eSierra 31041 Johnson\/Evinrude Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible Water Pump Kits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-marine-water-pump-kit-18-3380-johnson-evinrude-40-75hp-cooling-system-rebuild\"\u003eSierra Marine Water Pump Kit 18-3380 – Johnson\/Evinrude 40–75HP\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-marine-water-pump-kit-18-3390-johnson-evinrude-85-300hp-v4-v6-cooling-system-rebuild\"\u003eSierra Marine Water Pump Kit 18-3390 – Johnson\/Evinrude 85–300HP V4\/V6\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003eAlways confirm fitment against your engine service manual and full model\/year before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51156142719012,"sku":"47-3043","price":80.39,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/2c769835-4613-4b87-9713-73fbf785f307.png?v=1785122484","url":"https:\/\/marisolmarine.com\/products\/sierra-18-3043-johnson-evinrude-impeller","provider":"Marisol Marine Company","version":"1.0","type":"link"}